Combined latch and lock



(No Model.)

S. EHRMAN.

COMBINED LATCH AND LOCK.

No. 328,393. Patented Oct. 13, 1885.

INVEJV'TOR 9 a Q WITNESSES flttorney.

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SAMUEL EHRMAN, OF CONNELLSVILLE, PENNSYLVANIA, ASSIGNOB OF ONEHALF TOHENRY O. HUSTON, OF SAME PLACE.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent N0. 323,393, dated October13,1885.

Application filed July 8, 18%;). Serial No. 170,943. (No model.)

To all whom, it may concern:

Be it known that I, SAMUELEHRBIAN,&()itizen of the United States ofAmerica, residing at Oonuellsville, in the county of Fayette, in theState of Pennsylvania,have invented a new and useful Combined Latch andLook, of which the following is a specification.

My invention relates to improvements in door-Jocks of that class knownas latches and locks combined, wherein a movable body is latched orlocked to an immovable body by means of a single bolt; and the object ofmy improvements is to simplify existing mechani' cal contrivances usedto attain the purpose stated.

I have fully illustrated the means employed to effect the objects ofmyinvention in the aeeompanying drawings, wherein Figure 1 is a sideview of the lock with one of the face-plates removed and showing thecomplete internal mechanism, with the bolt shot forward and locked inthat position. Fig. 2 is a side view of the knob with sleeve providedwith lever fitted to its shank, and Fig. 3 is aside view of the tumblerhaving a key applied thereto.

The letter A designates the casing of the lock, comprised of theface-plate a and sides a a and end walls, a" a, the end wall, a, beingslotted or chambered to admit the passage of the bolt, as usual. Thecasingis also provided with screw-holes arranged at the corners thereof,through which fastening-screws are passed by which the lock is securedto the door.

The letter B designates the bolt, which consists, preferably, of astraight flat bar having a chamfered end andfitted to the slot or chanrher in the end wall of the case, and formed with a vertical projectinglug, I), on its upper edge, the purpose being to limit the'proj ectionof the bolt from the casing and to serve as a seat for the end ofthetumbler to rest againstwhen the bolt is shot out and locked in thatposition, substantially as seen in Fig. lof the drawings. In the rearportion of the bolt is formed a notch, 1/, preferably extended acrossthe outside of the side face of the bolt. This is designed to receivethe lever or arm of the hub of the turning-knob. The bolt is arranged inthe casing with its upper edge directly under the hub of the tumbler andthe rear end resting on the hub of the knob-spindle, with the slottedportion behind the arm thereof, and is thus held in position.

The letter O designates ahub having shoulders c c, fitted to a roundhole in each of the face-plates ot' the casing, and formed with aprojecting lever or arm, 0, adapted to rest within theslotin the rearofthe bolt. Asquare hole, 0, or of other angular shape, is formed in thehub, through which the knobspindle c is passed.

The letter D designates the tumbler, formed with a projecting arm orlcverd, having shoulders d dflwhich are seated in holes in the faceplates and adapted to be turnedin their seats. This device is the meansto lock the bolt, and for the purpose of conveniently turning it iscored out in any desired shape, and has fitted to the core a key, as d,the barrel of which is shaped to enter the aperture of the tumbler.

The letter E designates a weighted lever. This consists of a substantialpiece of metal of sufficient weight to force or shove the bolt withoutthe casing afterithas been drawn back by turning the knob or bytheaction of other forces. This weighted lever, p referabl y formed witha cam-shape lump, 0, onits front face to set against the end of thebolt, is suspended on a pivot, a, so as to set or rest with thecamshaped projection against the end of the bolt at all ti mes, and thusact to force the bolt forward and in engagement with the catch.

The operation of the lock is apparent, but may be here stated asfollows: The rear end of the bolt rests on the stem of the hub-sleeve,and the weighted lever presses against the end of the bolt and acts topress the bolt forward at all times. The bolt is operated by means ofthe knob in the opposite direction to the action of the weight, and byturning the knob so as to draw the bolt backward the weighted lever islifted and the bolt is withdrawn from the catch, and the door may thenbe opened.

The door may be closed by simple pressure, since the action of theincline on the end of the bolt against the catch will carry the boltinward, and when past the catch the bolt will be shot out by the forceof the weight. The bolt is fixed in a locked position by turning thetumbler so that its end shallsct against the inner face of the verticallug on the upper edge of the bolt. Under ordinary conditions of use thetumbler is turned in the positionindicated in dotted lines in Fig. 1 ofthe drawings.

It will be seen from the foregoing description, in connection with thedrawings, that every element of the lock has a positive action, allsprings with their complications, defects, and liability of imperfectaction being dispensed with, and a secure latch and lock provided at thelowest possible cost without jeopardizing its efficiency.

1 am aware that alock has been made wherein a weight is pivoted in thecasing and is lifted by a crank-lever pivoted in the lock,with one endconnected to the bolt and the other arm of the crank-lever adapted toengage with an arm of the tumbler; and, further, that a lock has beenmade with an inverted lever having an arm extended horizontally over andbehind the bolt and resting on the tumbler, the weight having itsvertical arm set against the end of the bolt, and is raised by theaction of the knob-spindle or key on the tumbler.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

In combination, the casing, the bolt formed with a vertical lug on itsupper edge and a slot in its side face, and held in horizontal positionby the hub of the tumbler and the hub of the knob-spindle, the knob andspindle provided with a hub, 0, formed with an arm, 0 arranged in theslot of the bolt, the weighted lever E, pivoted within the casing, withits front end to bear against the end face of the bolt, and the tumblerD, pivoted in the casing, with its hub on the upper edge of the bolt,andprovided with the arm adapted to set against the inner face of the lugon the bolt, substantially as described, and for the purpose set forth.

Intestimon y whereof Ihereunto set my hand inthe presence of twoattesting witnesses.

SAMUEL EHRMAN.

Attest:

I. K. TAGGART, J. L. KENDALL.

